Why are the Chicago Cubs called the Cubs?

In 1876, the Chicago White Stockings become one of eight charter members of the National League. 

The White Stockings go on to win the inaugural National League championship. Using nicknames such as the "White Stockings," "Colts," and Orphans," the team plays in five different locations in the 1800s

In 1902, noting the youth movement lead by new manager Frank Selee, a local newspaper penned the nickname Cubs for the first time. The moniker prevailed over time and was officially adopted by the club in 1907. It is currently one of the longest running-and most beloved-alias' in all of sports